REFERENCES
- Huelsman (LP). Equal valued capacitor active RC network realisation of a 3rd order lowpass Butterworth characteristic. Electron. Lett., 7, 1971; 271.
- Dutta Roy (SC) and Malik. Active RC realisation of 3rd order filter. Ibid, 8, 1972; 630–631.
- Gofal (K). Active RC realisation of a third order lowpass Butterworth characteristic using equal-valued passive elements. Proc. IEEE (letters). 62, 1; 1974; 135.